Series 75 Core Block – Single
Core Blocks are a true all round solution. A tuned 2-stage bearing system provides excellent performance across the full working load range with an integrated thrust bearing feature and the resilience to handle high dynamic or static loads. Acetal sheave, alloy cheeks and stainless fixings complete the durable package. For reliability and a long service life, these blocks are the right choice for sheets, halyards and control line applications for cruising and racing.
Universal Bearing
Dynamic and high static load performance
The Ronstan Universal Bearing incorporates our proven 2-stage bearing system
Stage 1 – Under moderate loads, Acetal ball bearings ensure minimum friction.
Stage 2 – Under heavy loads, where deformation of ball bearings alone would result in increased friction, a sliding Acetal bearing on a polished stainless steel race takes over, maintaining low friction performance.
Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks, preventing the sheave from rubbing on the cheeks and causing friction when the line lead in and out of the block isn’t perfect. Particularly important for cheek blocks.
Alloy Cheek Plates
Block cheeks are manufactured from the highest quality alloy for maximum strength. Material optimisation and the cut-away design minimises weight and allows easy fresh water rinsing of salt and debris from the bearings. Cheek design has been further styled with flaring at the block throat and reduced gap between the cheek and sheave, minimising rope wear.
Universal head
The head assembly incorporates a brass bearing washer to provide smooth 360 rotation of the post and shackle. A set screw arrangement allows the head to be locked at 0 or 90.
Shackles are high quality forged grade 316 stainless steel.
Features:
- Class leading performance and sleek, contemporary styling
- Excellent dynamic and high static load performance
- Less than half the friction of the nearest competitor
- Universal head with full 3-axis articulation
- Head posts can be locked at 0 or 90 degrees, by using a 2.5mm Hex/Allen Key
- Central hub hole can be used as a becket take-off or tie-up point
Applications:
- Ideal for mainsheet, halyard and spinnaker sheet applications on boats to 14M (46′)
- Various control line applications on larger yachts
Materials:
- Sheave: U.V. stabilized Acetal
- Cheek body: Aluminium Alloy
- Ball Bearings: High compression strength carbon black Acetal
- Shackle, head post & hub: Grade 316 stainless steel
Specifications:
Sheave Ø:t75mm(3″)
Max. Rope Ø:t14mm(9/16″)
Pin Ø:t8mm(5/16″)
M.W.L.:t1,500kg(3,300lbs)
B. L.:t3,000kg(6,600lbs)
Weight:t354g(12.5oz)
Professionally packed and fast shipping
Through our long-term relationship with UPS, FedEx, DHL and many other top global carriers we are able to offer various shipping options. Our warehouse staff is extremely skilled and will package your products according to our exact and precise specifications. Your items are carefully inspected and properly secured before shipping. We ship to thousands customers every day across multiple countries. This shows our commitment to be the largest online retailer on the planet. We have distribution centers and warehouses in Europe and the USA.
It is important to note that orders with more than one item are processed according to the specific item.
We will thoroughly inspect all items before sending. Most orders are shipped within 48 hours. The time to deliver varies from 3-7 days.
Returns
The stock is dynamic and we do not fully manage it because of the fact that many parties are involved, including our warehouse and factory. The actual stock can change at any moment. It's possible that the inventory could run out once your order has been processed.
Our policy runs for a period of 30 days. We cannot replace or refund your purchase after 30 days since the purchase.
The item cannot be in use and must be in the original packaging. It should also be in the original package.
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